115218725917 has 2 divisors, whose sum is σ = 115218725918. Its totient is φ = 115218725916.

The previous prime is 115218725863. The next prime is 115218725957. The reversal of 115218725917 is 719527812511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115179463161 + 39262756 = 339381^2 + 6266^2 .

It is a cyclic number.

It is not a de Polignac number, because 115218725917 - 2³⁵ = 80858987549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115218725957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57609362958 + 57609362959.

It is an arithmetic number, because the mean of its divisors is an integer number (57609362959).

Almost surely, 2^115218725917 is an apocalyptic number.

It is an amenable number.

115218725917 is a deficient number, since it is larger than the sum of its proper divisors (1).

115218725917 is an equidigital number, since it uses as much as digits as its factorization.

115218725917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 352800, while the sum is 49.

The spelling of 115218725917 in words is "one hundred fifteen billion, two hundred eighteen million, seven hundred twenty-five thousand, nine hundred seventeen".